Explosive.



UN lTliD STATES ANTON MIKOLAJCZAK, OF KASTROP, GERMANY, ASSIGNOR TO F. SCHNIEWIND,

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TRUSTEE, OF NEW YQRK, N. Y.

EXPLOSIVE.

Specification of Letters Patent.

Patented Feb. 8, 1910.

No Drawing. Original application filed April 18, 1504. Serial No. 203,762. Divided and application filed October 25, 1904. Serial No. 229,861. Again divided and this application filed August 3, 1906. Serial a subject of the King of Pru sia, and residing at liastrop, ll'estphalia, Germany, have invented certain new and useful improvements in the illanufacture of Explosives, of which the following is a specification.

This invention relates to the mainifacturc of explosives containing dinitroglycerin, and is a division of my application, Serial No. 229,961, filed Oct. 25, 190st, upon which Patent No. 910,936, was issued to me Jan. 26, 1909. and which. was a division of my prior application Serial No. 2023,4752, filed April 18, 190i, upon which Patent No. 79$,l-3t3 was issued to me Aug. 29, 1905, the manufacture of explosives containing dinitroglycerin having been described, but not claimed, therein.

According to the practice prevailing in the manufacture of dynamite, carbonite and other nitroglycerin explosives prior to my invention the necessary nitroglycerin is prepared in the form of trinitroglycerin of as pure a cha actor as possible, by nitroglycerin the glycerin trinitrate CQHAONOQ being understood.

In my application, Serial No. 229,9Gl,iiled October 25, 190 as a division of my above application, Serial No. 203,762, the disadvantages incident to the use of nitroglycerin have been set forth and the great advantages of dinitroglycerin in the manufacture of explosives have been pointed out as well as the fact that before my invention dinitroglycerii'i had never been isolated, its presence in trinitroglycerin having always been a matter of conjecture rather than proof.

I am the first, to have isolated dinitroglycerin and recognized its many desirable and highly valuable characteristics in employing it in the manufacture of explosives. Among other valuable characteristics which I found the dinit-roglycerin to possess and which all have been enumerated in my earlier applications above referred to, I discovered that the dinitroglycerin is just as good a solventand gelatimzing medium for various substances, such as nitro-cellulose, Xyloidin etc, asis trinitroglycerin, and in dis.-

solving gclatinizing media in dinitroglyccrin, whereby its viscosity is increased, and int-oiporatingsome combustible material such as: wood-meal with said mixture, highly eflieient and valuable explosives can be obtained, of which examples have been given in my above applications.

The absorbent material mixed with the dnutroglycerin may be inert, such as lHGSGlguhr. or a combustible, suclnas charcoal or.

wood-meal, or the absorbent material may be itself an explosive, such as pulp gun-cotton, iefore mixing the dinitroglyccrin with one of these absorbent materials, which may be done either by hand or by a suitable mixing apparatus, it is preferably rendered more viscous by dissolving therein a gclatinating' agent, such as collodion cotton. \Vhile the range of collodion cottons soluble in trinitro glycerin is very narrow, dinitroglyceriu. in this respect, is a much better solvent. he 'ariety of soluble pyroxolyn known as pyrocollodion, the nitrogen contents going as high as 12.8% is still soluble in dinitroglycerin, even at ordinary temperature.

specific examples may be stated: 1. Dinitroglyccrin, 70; wood meal, 20; pulp gun cotton, 10. 2. Dinitroglycerin, 70; collodion cotton, 2.50; wood-meal, 20; pulp gun cotton, 7.50. An exaniple of my method of manufacturing dinitroglycerin has been fully described in my said earlier applications. The dinitroglyccrin is obtained as a colorless oil, when the "glycerin and the nitric acid, from the mixture of which dinitroglycerin is obtained. are colorless, i. 0. free from impuri ties. Dinitroglyccrin is soluble in water to a large extent and by reason of this property can very well be obtained quite pure, for instance by fractional evaporation of the water. The well-known solvents for nitroglycerin also readily absorb dinitrogrlycerin. The percentage of nitrogen acco'rdingto calculation is 15.38. An actual analysis (nitronie- 'ter and organic analysis) showed theaverage to be 15.38pm centum.

lVhat I claim and desire to secure by Letters Patent is:

1. a "new article of manufacture an explosive pontaining dinitro-glycerin and ab- In testimony whereof I affix my signature sorbegt material. f in presence of two Witnesses.

2. s a new article of manu acture an eX- L plosive containing dinitro-glycerin having ANTON MIKOLAJCZAK' 5 been rendered more viscous by the addition Vitnesses:

of gelatinating medium and absorbent ma- \VILLIMI EssENwnIN,

terial. Y ERNEST E. SCHOE. 

